2024

Vol.31 No.3

Editorial Office

Review

  • Journal of the Microelectronics and Packaging Society
  • Volume 30(1); 2023
  • Article

Review

Journal of the Microelectronics and Packaging Society 2023;30(1):79-89. Published online: May, 11, 2023

Low-iridium Doped Single-crystalline Hydrogenated Titanates (H2Ti3O7) with Large Exposed {100} Facets for Enhanced Oxygen Evolution Reaction under Acidic Conditions

  • JungSun Young, HanHyukSu
    Department of Energy Engineering, Konkuk University, 120 Neungdong-ro, Seoul 05029, Republic of Korea
Corresponding author E-mail: hhan@konkuk.ac.kr
Abstract

Development of efficient and stable electrocatalysts for oxygen evolution reaction (OER) under acidic conditions is desirable goal for commercializing proton exchange membrane (PEM) water electroyzer. Herein, we report iridium-doped hydrogenated titanate (Ir–HTO) nanobelts as a promising catalyst with a low-Ir content for the acidic OER. Addition of low-Ir (~ 3.36 at%) into the single-crystalline HTO nanobelts with large exposed {100} facets significantly boost catalytic activity and stability for OER under acidic conditions. The Ir-HTO outperforms the commenrcial benchmark IrO2 catalyst; an overpotential for delivering 10 mA cm-2 current density was reduced to about 25% for the Ir-HTO. Moreover, the catalytic performance of Ir-HTO is positioned as the most efficient electrocatalyst for the acidic OER. An improved intrinsic catalytic activity and stability are also confirmed for the Ir-HTO through in-depth electrochemical characterizations. Therefore, our results suggest that low-Ir doped single-crystalline HTO nanobelts can be a promising catalyst for efficient and durable OER under acidic conditions.

Keywords Electrocatalyst, oxygen evolution reaction, hydrogenated titanate, low iridium

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